Telesteps Telescoping Extension Ladders feature a heavy-duty aircraft-grade aluminum construction. Their telescoping design locks from the bottom as you extend the ladder. A patented one-touch release collapses the ladder quickly and easily. Each step has a built-in safety indicator and the base has pivoting silicone feet. See below for buying options. Telesteps designs these ladders with professionals in mind. They are ANSI 14.2 tested and OSHA-compliant. Their telescoping design allows you to use them at full height or by the foot for just the right height. The built-in safety indicators let you know when each step is locked and ready to climb. You can safely use these ladders on uneven surfaces thanks to the grip strength of the pivoting silicone feet. These revolutionary telescoping ladders are easy to store and transport. Telesteps' patented one-touch release collapses the entire ladder in seconds. The manufacturer covers these products with a 1-year warranty against manufacturing defects.